Those with the Apple iPhone 7 Plus might understandably wish they had upgraded to the Apple iPhone 8 Plus or Apple iPhone X, especially if they like the Portrait Lighting feature on the new models. With Portrait Lighting, users can create certain depth effects with the background of a portrait, including a black background that completely hides the location where the portrait was snapped.

Until now, those with the iPhone 7 Plus had to jailbreak their phone in order to access the feature. But now, a photography app named Focos that has already been sitting in the App Store, has added a new feature called "Black Portrait" mode that will allow the iPhone 7 Plus to use some of the same Portrait Lighting options found on the iPhone 8 Plus and iPhone X. Depth effects similar to what Portrait Lighting offers is available using the "Black Portrait" and "Background Picture" filters.

Focos is a free app and requires that the iPhone it is loaded on have a dual-camera setup for the "Black Portrait" mode. That means that the feature is only compatible with the iPhone 7 Plus, iPhone 8 Plus and iPhone X. All other computational photography features available from the app can be used on the Apple iPhone 5s or later, running iOS 11 or higher.